Set of 4 – These sensors have been tested and confirmed to have a strong voltage reading. These are genuine oem parts that have come from a liquidated Carquest Store. They also have a genuine Panasonic Lithium Batteries inside, so you know they will last for 10 more years just as your original ones have. Parts can be tested at dealership without opening the bag, they use a device to connect wirelessly to check battery and verify true Toyota OEM parts. 4 Genuine OEM Toyota Tire Pressure Monitoring Sensor with Panasonic Battery w/ Part #’s 42607-0C020, 42607-0C040, 42607-0C060, 42607-0C080. These part numbers are the very same part, there is no difference. I have a mixture of all these part numbers. Why such a low price? Sourced directly from an Advance Auto Parts liquidation sale. Ive had a few buyers ask about the price and why so low compared to others? So, let me explain why I price my items at such a low cost to you. Because I have a limited amount of storage for my inventory, It’s not feasible for me to hold merchandise for long periods of time. This is what works for me. If you have any questions, I encourage you to ask. Its my job to answer any and all questions, so dont be shy! It could save you from wasting a massive amount of time, should you need to return it after ordering the wrong part. And by the way….. Support This Micro-Business Today and help us grow into a Small Business Tomorrow.